<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // 浅拷贝，把对象第1层的属性和值，拷贝给另一个对象
      let obj1 = { title: 'aaaaaa', subject: '前端' }

      // -------------------- 直接赋值 ------------------
      // let obj2 = obj1 // (直接赋值，赋值的是地址)
      // obj2.title = 'bbbbb'

      // -------------------- 浅拷贝 -------------------
      let obj2 = { ...obj1 }
      obj2.title = 'bbbbbbb'

      console.log(obj1, obj2)
    </script>
  </body>
</html>